Thermophysical Property Measurements of Refractory Oxide Melts With an Electrostatic Levitation Furnace in the International Space Station
Due to their high melting temperatures and the risk of contamination from the crucibles, molten oxides which melting temperatures are above 2000 °C can hardly be processed using conventional methods. This explains that their thermophysical properties are very scarce. Containerless methods with gas f...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-07-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2022.954126/full |
| _version_ | 1828399555350102016 |
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| author | Takehiko Ishikawa Paul-François Paradis Chihiro Koyama |
| author_facet | Takehiko Ishikawa Paul-François Paradis Chihiro Koyama |
| author_sort | Takehiko Ishikawa |
| collection | DOAJ |
| description | Due to their high melting temperatures and the risk of contamination from the crucibles, molten oxides which melting temperatures are above 2000 °C can hardly be processed using conventional methods. This explains that their thermophysical properties are very scarce. Containerless methods with gas flows have been developed and several thermophysical properties such as density, surface tension, and viscosity have been reported. However, the gas flow has detrimental side effects such as deformation of the sample and induction of internal flows in the molten sample, which affect the accuracy of the measurements. The electrostatic levitation furnace onboard the International Space Station (ISS-ELF), which utilizes the Coulomb force to levitate and melt samples in microgravity, has several advantages for thermophysical property measurements of refractory oxide melts. Levitation without a gas flow coupled to a reduced gravity environment minimizes the required levitation (positioning) force and reduces the deformation as well as the internal flow. This report briefly introduces the ISS-ELF facility and the thermophysical property measurement methods. The measured density, surface tension, and viscosity of molten Al2O3 are then presented and compared with the ones obtained by other methods. Finally, the measured data of refractory oxides whose melting temperatures are above 2,400 °C are summarized. |
| first_indexed | 2024-12-10T09:19:14Z |
| format | Article |
| id | doaj.art-f22f8908e4884c5390d93137c2112d6b |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-12-10T09:19:14Z |
| publishDate | 2022-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-f22f8908e4884c5390d93137c2112d6b2022-12-22T01:54:45ZengFrontiers Media S.A.Frontiers in Materials2296-80162022-07-01910.3389/fmats.2022.954126954126Thermophysical Property Measurements of Refractory Oxide Melts With an Electrostatic Levitation Furnace in the International Space StationTakehiko Ishikawa0Paul-François Paradis1Chihiro Koyama2Japan Aerospace Exploration Agency, Tsukuba, JapanINO, Quebec City, QC, CanadaJapan Aerospace Exploration Agency, Tsukuba, JapanDue to their high melting temperatures and the risk of contamination from the crucibles, molten oxides which melting temperatures are above 2000 °C can hardly be processed using conventional methods. This explains that their thermophysical properties are very scarce. Containerless methods with gas flows have been developed and several thermophysical properties such as density, surface tension, and viscosity have been reported. However, the gas flow has detrimental side effects such as deformation of the sample and induction of internal flows in the molten sample, which affect the accuracy of the measurements. The electrostatic levitation furnace onboard the International Space Station (ISS-ELF), which utilizes the Coulomb force to levitate and melt samples in microgravity, has several advantages for thermophysical property measurements of refractory oxide melts. Levitation without a gas flow coupled to a reduced gravity environment minimizes the required levitation (positioning) force and reduces the deformation as well as the internal flow. This report briefly introduces the ISS-ELF facility and the thermophysical property measurement methods. The measured density, surface tension, and viscosity of molten Al2O3 are then presented and compared with the ones obtained by other methods. Finally, the measured data of refractory oxides whose melting temperatures are above 2,400 °C are summarized.https://www.frontiersin.org/articles/10.3389/fmats.2022.954126/fulllevitationhigh temperature meltdensitysurface tensionviscosity |
| spellingShingle | Takehiko Ishikawa Paul-François Paradis Chihiro Koyama Thermophysical Property Measurements of Refractory Oxide Melts With an Electrostatic Levitation Furnace in the International Space Station Frontiers in Materials levitation high temperature melt density surface tension viscosity |
| title | Thermophysical Property Measurements of Refractory Oxide Melts With an Electrostatic Levitation Furnace in the International Space Station |
| title_full | Thermophysical Property Measurements of Refractory Oxide Melts With an Electrostatic Levitation Furnace in the International Space Station |
| title_fullStr | Thermophysical Property Measurements of Refractory Oxide Melts With an Electrostatic Levitation Furnace in the International Space Station |
| title_full_unstemmed | Thermophysical Property Measurements of Refractory Oxide Melts With an Electrostatic Levitation Furnace in the International Space Station |
| title_short | Thermophysical Property Measurements of Refractory Oxide Melts With an Electrostatic Levitation Furnace in the International Space Station |
| title_sort | thermophysical property measurements of refractory oxide melts with an electrostatic levitation furnace in the international space station |
| topic | levitation high temperature melt density surface tension viscosity |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2022.954126/full |
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